COMPARATIVE ANALYSIS OF CANNY, SOBEL, PREWITT AND ROBERTS EDGE DETECTION OPERATORS ON EYE IRIS IMAGES. jitk [Internet]. 2024 Jul. 31 [cited 2026 Feb. 10];10(1):83-90. Available from: https://ejournal.nusamandiri.ac.id/index.php/jitk/article/view/5062